DE2042108A1 - Process for the production of sheets of polymeric material containing fibers - Google Patents

Description

ratentafiwelt

Dipl.-Ing. K. Walther

IBERLlN 19 2042108

Bo) ivar * I! Ee 9

Tel. 3044285 19 “August 1970

W-w-2681

Wiggins Teape Research * Development limited, Gateway House, 1 Watling Street, London E _O G _O 4 _t England

Process for making sheets containing pastes

made of polymers! material

The e _r invention relates to a "method for producing sheets of polymeric material containing parsers are that are thermoformable or kaltverpressbar *

The invention is based on the object of being able to continuously produce such sheets using the screen of a paper or board machine _e

The inventive method consists in that a paste by intimate mixing of natural or synthetic polymeric pesticide particles are formed with a binder, that a Paserpulp is prepared, and that a Entry by intimately mixing the paste with the Paser pulp in a ratio of 25 to 75% by weight of paste to 75 to 25% by weight Pasern is formed and the entry is dewatered on a sieve and then dried »

Pastes for the purposes of e _r invention are also liquid pastes,

When conducting a procedure, it is provided that the Binder is used in pora an emulsion and the paste in the ratio of 25 to 75 wt # of pesticide particles to 75 to 25 0ew £ bindtr is being prepared

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According to a further feature of the E _r invention the paste chemically similar solid particles and binder in a ratio of 34 wt # solid particles to 66 Grew be used for treatment # binder used too, it is expedient if the binder in the form of an emulsion is used, "

Fibers made of wood, cotton, asbestos, synthetic fibers made of polyamide can be used as fibers for the fiber pulp and polyester, machined fibers made of carbon, glass, rayon, and metal can be used.

It is also provided that a precipitant is added to the fiber pulp »

According to a further feature of the invention it is provided that the dried product exposed to a Wirde pressure of 35 to 281 kg / cm ² at a temperature between 13O ⁰ C and 200 ⁰ G

Suitably is formed between the drying and heating the product to this, a surface layer by ψ at a temperature between 100 ⁰ C and 120 ° at a pressure of 1.4 to 3.5 kg / cm is subjected ·

Another characteristic of the ^ r ^^ cUme is called Fiber pulp uses a foamed suspension of fibers,

The e _r-making is based on the drawing explained in more detail · In the drawing,

Fig. 1 is a flow chart of a first process guide and

Fig. 2 is a flow diagram of a modified process management.

109810/2005

In the process procedure of FIG _o 1 thermoplastic Pestkörperpartikel be, "for example, intimately mixed from Akrylnitrilbutadienstyrol or polyethylene, or a mixture of these substances, or wärmehartbare solid particles, for example from Epoxyhaz, phenol resin or lOrmaldehydharz or mixtures of these substances, with a binder in a mixer 1, The usual additives in the polymerization process, such as antioxidants, plasticizers or fillers, can be added to these substances. The mixer 1 can be a rotating mixer, for example as used for mixing concrete and the binder is then slowly added with simultaneous mixing «The binder can be a thermoplastic or thermosetting or natural polymer or oligomer, for example styrene butadiene, acrylonitrile butadiene styrene, melamine or ureaformaldehyde resins, guarguaini, starch or pectin«,

Are the solid particles and the binder chemical

similar, 211a example for solid particles made of polyethylene

{and a suspension of polypropylene or polystyrene and ι as a binder polystyrene emulsion, it is advantageous one j to use a larger proportion of binder than solid particles, because in the formation of solid particles from plastic Resin the emulsion or solution is cheaper to obtain by emulsion or solution polymerization, i.e. the emulsion or

<en
Solution to provide a pre-hardener for the synthetic resins.

In general, the proportions of the proportions are in

1 η 9 B1 η / 2 η η β _ ₄ "

ff, - · I Λ

L ¹ J ¹ ^ .-

the ranges of 25 & ew $ peststoffpartilculn 2U 75 G-ew / s I.:, ..... of and 98 G-ew $ solid particles to 2 wt ^ .binder, where * ■. the percentages take into account that emulsions are between. Contains 30 to 65% by weight of solid particles, and solvents between 2 and 95% of solid particles by weight. w'v c .-- a high proportion of thermosetting Kunsthars used to its composition should be, including the _US 2 chläge adjusted so that during the ^v experienced its Ve: netzungsbedingungen are not achieved. If small Ä '· parts of wärmehättbaren resins in conjunction with Uier plastic resins used and does not disturb the networking, the Pliessfähigkeit the mixture, these V _o rsiciri. Measure is unnecessary. The shares are to be chosen so that a medium-stiff dough is formed.

Preferred proportions of the components of the paste are listed below:

1 «, When using a binder in the form of an emulsion, it is advisable to use 25 to 75% by weight of solid particles and 75 to 25% by weight of binder _{or the like}

2ο When using a binder in a F _o rm Emulsie and chemical similarity between solid particles and binder, for example solid particles from Akrylnitrilbutadienstyrol are practical to choose 34% by weight of solid particles to 66 wt $ Binder "

3. The highest proportions of solid particles too Binders are only suitable for binders that contain natural polymer » o-ier are oligomers, such as gum, pectin or starch «

1098 10/2005 ~> "

In a mixer 2, a fiber pulp is prepared, such as is used in the manufacture of paper, to which a precipitating agent is optionally added. The fibers can be natural fibers, for example made of H ₀ Iz, cotton or asbestos, synthetic fibers, for example made of polyamide or polyester, and processed fibers, for example made of aluminum, glass, rayon or metal. Mixtures of such fibers are also suitable. "Chryolite asbeat of high purity or alum can be used as the precipitating agent

The paste prepared in the mixer 1 and the fiber pulp prepared in the mixer are supplied to the stock box 3 of a paper machine fed and there intimately mixed with one another to form an entry, which is then on the screen 4 of a paper or Cardboard machine is brought to be dewatered * The product is then dried *

The entry contains 25 to 75 wt # fibers and 75 to 25 wt # paste, preferred proportions are the following _o

I. For reinforced blades, use 66 to 75 wt # of paste used on 34 to 25 wt # fibers

%. For filled leaves the proportion is 50 Gewji paste and 50 Gew # fibers

Filled sheets contain a greater proportion of fibers than reinforced sheets with the same polymer-fiber system. In reinforced sheets , the fibers support the physical properties of the polymer, while in filled sheets the fibers mainly serve as fillers *

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ZUH / ί '"· <O

The dehydrated and dried leaves usually leave the paper or board machine in a soft Condition with a crumbly structure. In order to achieve a flat, smooth and strong sheet that can be formed by hot or cold forming Solution can be continued, stabilization was carried out by forming a surface layer by heating underneath Pressure. This can be achieved by means of hot rollers 5 or by means of a laminating press. Temperature and pressure are here depending on the polymer and the mixture contained in the sheet, for the sheets according to table 3 for example, the surface layer is using

of temperatures between 100 ⁰ C and 12o ° C and pressures between

1.4 and 3.5 kg / cm that formed continuously the paper or The product leaving the board machine can be wound onto a reel before or after the formation of the surface layer

or cut into leaves.

V
The stybilized product can then be processed, * !! »

plant are fed, such as a Vakuumverfor- mung plant, in which the deformation is normally at a temperature between 130 ⁰ C and 200 ⁰ C and pressures between 35

and 281 kg / cm takes place »

When carrying out the process according to Pig »2, the fest ·» material particles are intimately mixed with the binder in the mixer 1 " in order to form the paste. In a cell designed, for example, as a foam flotation cell 6, a cell is foamed

Suspension of fibers processed as a precipitant Chrysolite asbestos of high purity is added »This Heratel-

109810 / 2.006

Development is described in GB-PS 1,129,757

The paste is fed into the flotation cell 6 and intimately mixed with the foamed suspension of the fibers, with the addition of a surface treatment agent if necessary to maintain the foam. «The pH The entry formed in cell 6 can, if desired can be reduced by adding alum. The entry is then brought to the sieve 4 and dewatered there, then dried and in the manner previously described, the product

stabilized

Examples according to the Verfahrungsführung FIG _o 1 produced products are in Table 1 below

listed:

attempt

Fibers

Thermoplastic «
material

'felling agent

• PH value

of the request

6.8 kg of bleached wood sulfate pulp

15.6 kg of acrylonitrile
butadiene tyrene powder

17.7 1 Acrylonitrile butadiene pyrole latex

0.34 kg Chrysolitas_ best
great purity

by alum on

reduced

4.3 kg of bleached wood sulfate pulp

12.7 acr ^ nitrile butadi ens tyrol powder

0.227 kg of chryolite

\ asbebest 22.75 1 styrene butadiene> -grosser latex

purity

6.8 kg of bleached wood sulfate pulp

1.36 kg nylon about 6 mm long

So1

s _o 1

S _e 1

0 9 8 1 0/2005

■ / ί i /, ν Ί ■

In each of these attempts more than 95? ^ Df? brought

Polymers in the sheet "retained τιτχά sheets -: i: z .. ·

which can be processed by vacuum deformation, _etc.

Examples erf for after ler V ahrensf like EADERSHIP iss Fi products produced are given in the following three Satcl ^ ia and:

098 1 0/2005

ο co

o m

Tersueh Paser More thermoplastic
material Precipitants Surcharge PH value
of the one
sluggish 1 80 g of light wood
sulfate pulp 11Og acrylonitrile butadiene
styrene powder
200 cm- ⁵ acrylonitrile buta-
service tyrollatex 5 g chrysoJctas
best big
purity Triton X 10
Propellant ⁰ I.
; I through
additive
from
Ala ^ ·
on
4th
ver
wrestles 2.
ί 72 g bleached wood
sulfate pulp
8 g of glass fibers • 143 g of acr ± nitrile butadiene
styrene powder
150 cm ³ acrylonitrile buta-
service tyrollatex 3.1. s _e 1 P.1 p.1 160 g acrylonitrile butadiene
styrene powder
200 enr acrylonitrile buta-
service tyrollatex 4 g chrysolite ~
asbestos wholesale
this purity see 1 s.1

In all tests, more than 95 $ of the polymer introduced was retained in the sheet and sheets obtained which can be processed by vacuum deformation _o α

Triton X 100 manufactured by Pa, Röhm & Haas is an Octylphenoxypolyethoxyäthanol or einco Alkylaryl polyether alcohol.

search ί Paser More thermoplastic
material Coating agents Surcharge pH value den
Entry ί
3.
ΐ 32.2 kg. carbon
fibers 12-24 mm long
14.1 kg of wood pulp 9.1 kg ο acrylonitrile
but adi ens tyrene powder
14.8 1 acrylonitrile
butadiene pyrole latex 0.227 kg Chrysollt
asbestos bigger
purity 4.55 1
Triton X 100
Propellant
(Pa.Röhm &
Haas) dui'cli Su-
sentence of
alum
on 4
decreased 4th
ι 360 g rayon
9 g wood pulp 900 g acrylonitrile
butadiene styrene powder
1500 cm ⁵ acrylonitrile
butadiene pyrole latex 22.5 g chrysolite
asbestos bigger
purity - -.1. 360 g rayon
90 g wood pulp 450 g acrylonitrile
but adi ens tyrene powder
3000 cm ⁵ acrylonitrile
butadiene pyrole latex s.2o em ad 360 g rayon
90 g wood pulp 900 g acrylonitrile
butadiene styrene powder
1350 cm ⁵ acrylonitrile
butadi ens tyrollat ex
150 cm 'butadiene tyr oil
unsaturated carboxyl
acid terpolymer see 2. Θ.1
NJ
he

Is retained greater than 95% of the incorporated polymer in the sheet. Leaves after trial can be processed by Yalcuum deformation.

ΊΟ: - :? 1 Ü β - 11 -

Further examples of the procedure according to Pig, 2 are described below: Example 1

1. 100 g softwood sulphate pulp and 5 g cftrysolite asbestos of high purity are disintegrated and mixed intimately with 2 liters of water. After dilution with water to a total volume

■ 7.

is of 5 1 and adding 12 cnr Triton X 100 blowing agent is foamed, the suspension in which, for example, an S _c HAUM-F] etationssselle forming cells 6, so that an air content of about ₀ received opyfc

2. The pH of the foamed suspension is reduced by the addition of aluminum sulfate to the value of 4.5 and in the mixer (B ^ ₀ Lg 2) a paste of 34 g Peststoffparti- no cm polyethylene with 220 AkrylnitrilbutadienstyrolcopolymerlatK (66 g Pest constituent) intimately mixed, the paste formed is then added to the foamed suspension and a total concentration of the pesticide components of 4 is set. A further addition of 12 cm Triton X 100 keeps the foam upright

3 * The entry formed contains sufficient solids particles to form a sheet of 200 or 400 g / m after dewatering on the wire of a paper machine «,

4. The dehydrated product is dried at 90 ° on a drying drum. Individual sheets are then placed at a temperature of 140 ^° C. for two minutes under a pressure of 141 kg / cm in order to melt the thermoplastic materials, so that smooth, tough, transparent ones with fibers

109810/200 5 -12-

2Ü42108.

ο give starched leaves of 200 and 400 g / m weight "

5ο Two sheets of 4-00 g / m ² weight and a sheet of 200 g / m 2 weight are ^{heated to HO 0} G and subjected to a pressure of 352 kg / cm for five minutes to produce a sheet of 1000 g / m ² weight to achieve that smooth, tough and transparent

Example 2

Steps 1 and 2 of example 1 are replaced by the following steps:

6.25 g of softwood sulfate pulp is disintegrated in 2 l of water. After dilution with water to a total volume of 5 1 and addition of 12 cm Triton X 100 blowing agents, the suspension is foamed in the cell 6 (FIG _o 2) is achieved so that an air content of 65 $ "

7ο 35 g of solid particles made of polyethylene are intimate

• z

with 580 cm a 6 $ aqueous solution of a polymerizable melamine formaldehyde resin <ij (35 g solid resin) are mixed, wherein a ² usatz of 0.5 cm Triton X 100 as a blowing agent, the crosslinking of the polyethylene powder facilitated The paste thus formed is of foamed suspension in added to the cell 6 after it has been brought to a pH of 5 by adding aluminum sulfate solution. There is an intimate mixing, whereby an entry with a total concentration of solids of $ 2 is achieved «

Then steps 3 to 5 of example 1 are carried out «

109810/2005 -13-

Example 3

8 _β 10Og softwood sulphate pulp are disintegrated in 2 liters of water o After dilution with water to a total volume of 5 liters and addition of 12 cm Triton X 100 as a propellant, the suspension is foamed in cell 6 so that an air content of about & 5% is achieved.

9. 270 g of solid particles ate polyethylene are mixed in the mixer 1 (which is a household mixer _{p for} ten minutes with 300 cm ^{5 of} a 10.2% solution of a fruit pectin and 200 cm of water. The thick paste obtained is added to the foamed suspension I 100 _c of a further 12 cm Triton as a blowing agent for maintaining the S haums fed and intimately mixture a concentration of solids of 8 $ related so that the generated water has JEintrag «^,

10 »The entry contains solids to form sheets of 300 or 600 g / m weight when placed in a vacuum on the The sieve of a paper machine being drained,

11. The dehydrated product is at 90 ⁰ C on drying drums dried Individual sheets are then heated to a temperature of 100 ⁰ O. This temperature is lower than the corresponding temperature in Examples 1 and 2, since the softening point of the polyethylene appears to have decreased and the polyethylene fiber mass melts perfectly at this lower temperature. It is pressed in a press for 30 seconds at a pressure of 352 kg / cm ² , which would look and produce transparent plastic sheets reinforced with fibers. At the aforementioned higher temperatures for

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2Ü42108

-H-

Melting of the polyethylene in the order of 140 ° C were particularly good flow properties of the product were observed.

In all of the examples, the proportion of solid particles remaining in the end product was very large was more than in most cases

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-15-

Claims (1)

Patent claims: J Method of making fibers containing Sheets made of polymer material, which are heat-deformable or cold-pressable, characterized in that, that a paste is made by intimately mixing natural or synthetic polymeric pesticide particles with a Binder is formed that a fiber pulp is prepared, and that an entry by intimately mixing the paste with the Fiber pulp in a ratio of 25 to 75 G-ew # laste to 75 to 25 wt # fibers is formed, and the entry on a sieve is dehydrated and then dried. 2e method according to claim 1, characterized in that that the binder is used in the form of an emulsion and the paste in a ratio of 25 to 75 weight ^ solid particles to 75 to 25 & ew $ binder is prepared to 5ο The method according to claim 2, characterized in that chemically similar solid particles and binders in a ratio of 34 G-ew # solid particles to 66 Grew # binders are used to prepare the paste ₀ 4. The method according to claim 3, characterized in that that the binder is used in the form of an emulsion. 5. The method according to any one of claims 1 to 4, characterized in that for the formation of the entry a ratio of ; 66 to 75% paste is used to 34 to 25% by weight fibers. ! 6. The method according to any one of claims 1 to 4, characterized j indicates that a ratio of ι 50 wt # paste is used for 50 wt # fibers, 109810/200 5 ~ ¹⁶ - -. 16 - 7β Method according to one of claims 1 to 6, characterized characterized that natural fibers from wood, tree corrugation and asbestos are used for the fiber pulp, 8. The method according to any one of claims 1 to 6, characterized in that synthetic fibers ams for the fiber pulp Polyamide or polyester can be used. 9ο Method according to one of claims 1 to 6, characterized marked that man-made fibers / made of carbon, glass, rayon and metal are used. 1O ₀ ^ experience according to one of claims 1 to 9, characterized in that a precipitant is added to the fiber pulp «, 11 »The method according to any one of claims 1 to 10, characterized in that the dried product at a 'temperature between 130 ⁰ O and 200 ⁰ C a pressure of 35 to 281 kg / cm is exposed « 12 _O ^ experience according to claim 11, characterized in that a surface layer is formed on the product between drying and heating by applying a pressure between 1.4 and ^{120 ° C at a temperature between 100 ° 0 and 120 0 C} 3.5 kg / cm is exercised 13e method according to any one of claims 1 to 12, characterized characterized in that a foamed suspension of fibers is used as fiber pulp, 1 0 9 B 1 Π / 2005